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Setting up Forster benchrest sizing die help

 
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Old 01-09-2011, 09:06 PM
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Setting up Forster benchrest sizing die help

I recieved my new Forster benchrest dies. The instructions for setting up the seating die seems pretty straight-forward. The sizing die though says to line up the hole in the die with the lower third of the ball expander. Question is.....how do I do this? The hole is much too small for seeing anything in there. How do you guys set these dies up? Meaning, how do you know that the ball expander is in it's proper position?
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Old 01-10-2011, 06:24 PM
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Re: Setting up Forster benchrest sizing die help

The way I do it is by running the case up into the die before locking down the expander assembly. The primer push pin will go through the flash hole. Then I tighten the assembly. That's about as good alignment as you can get.
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Old 01-10-2011, 08:52 PM
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Re: Setting up Forster benchrest sizing die help

Quote:
Originally Posted by flashhole View Post
The way I do it is by running the case up into the die before locking down the expander assembly. The primer push pin will go through the flash hole. Then I tighten the assembly. That's about as good alignment as you can get.
You mean even before putting the die into the press right?
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Old 01-10-2011, 08:59 PM
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Re: Setting up Forster benchrest sizing die help

No, I do it with the die in the press.
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Old 01-10-2011, 09:13 PM
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Re: Setting up Forster benchrest sizing die help

So if I adjust the depth with the locking ring, to get the pin to come through the flashhole, then what do I adjust the top of the die for?
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Old 01-10-2011, 09:24 PM
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Re: Setting up Forster benchrest sizing die help

The pin needs to protrude through the flash hole to a sufficient depth that it pushes the spent primer out of the case. That adjustment is done from the top of the die.

The two things you want adjusted with the expander assembly are the depth and you want it to be on center. Some dies are sloppy and need a bit of help to get properly aligned.

Another trick you can use to minimize runout is to run a lubed case up into the die before you tighten the die ring. It provides good axial alignment of the ram to the die.

I hope it goes without saying you have to lube your case before running it up into the die no matter what you are trying to adjust. I like Imperial Die Sizing Wax the best.
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Old 01-10-2011, 09:58 PM
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Re: Setting up Forster benchrest sizing die help

Forster dies have small pressure/lube hole in the threads of their br dies. Put a small paperclip in the hole and adjust as they direct, looking up from the base of the die. test depth by sizing a piece of brass and see if it drops out the fired primer completely without going too deep.
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